Function map_sections

objdiff-core/src/obj/read.rs:365–416

(
    _arch: &dyn Arch,
    obj_file: &object::File,
    split_meta: Option<&SplitMeta>,
)

}

fn map_sections(
    _arch: &dyn Arch,
    obj_file: &object::File,
    split_meta: Option<&SplitMeta>,
) -> Result<(Vec<Section>, Vec<usize>)> {
    let mut section_names = BTreeMap::<String, usize>::new();
    let mut max_index = 0;
    let section_count =
        obj_file.sections().inspect(|s| max_index = max_index.max(s.index().0)).count();
    let mut result = Vec::<Section>::with_capacity(section_count);
    let mut section_indices = vec![usize::MAX; max_index + 1];
    for section in obj_file.sections() {
        let name = section.name().context("Failed to process section name")?;
        let kind = map_section_kind(&section);
        let data = if kind == SectionKind::Unknown {
            // Don't need to read data for unknown sections
            Vec::new()
        } else {
            section.uncompressed_data().context("Failed to read section data")?.into_owned()
        };

        // Find the virtual address for the section symbol if available
        let section_symbol = obj_file.symbols().find(|s| {
            s.kind() == object::SymbolKind::Section && s.section_index() == Some(section.index())
        });
        let virtual_address = section_symbol.and_then(|s| {
            split_meta
                .and_then(|m| m.virtual_addresses.as_ref())
                .and_then(|v| v.get(s.index().0).cloned())
        });

        let unique_id = section_names.entry(name.to_string()).or_insert(0);
        let id = format!("{name}-{unique_id}");
        *unique_id += 1;

        section_indices[section.index().0] = result.len();
        result.push(Section {
            id,
            name: name.to_string(),
            address: section.address(),
            size: section.size(),
            kind,
            data: SectionData(data),
            flags: Default::default(),
            align: NonZeroU64::new(section.align()),
            relocations: Default::default(),
            virtual_address,
            line_info: Default::default(),
        });
    }
    Ok((result, section_indices))
}

const LOW_PRIORITY_SYMBOLS: &[&str] =
    &["__gnu_compiled_c", "__gnu_compiled_cplusplus", "gcc2_compiled."];